A tubular heat exchanger technology suitable for medium and deep geothermal wells is introduced in this paper,which can achieve heat transfer without mass transfer,heat extraction without water extraction,and maximize the use of deep geothermal heat without consuming deep groundwater.The actual test shows that the heat extraction of a single well can reach 118 W/m,which has the advantages of large heat extraction and low operation cost in the later stage.Practical engineering applications demonstrate that the use of'geothermal+'mode can effectively solve many problems caused by the shutdown of geothermal wells.The utilization of closed medium and deep geothermal wells for heat extraction without groundwater extraction effectively avoid the waste of funds caused by idle medium and deep geothermal wells.At the same time,it can provide users with efficient and clean energy supply.
Middle and deep geothermal wellTubular heat exchangerHeat extractionExperiment
NETL
NSTL
维普
万方数据
